%%
%% The LaTeX Companion, 3ed
%%
%% Example 11-3-10 on page II-159 in "Commutative diagrams with standard \LaTeX {}".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3examargin}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{147.0pt}

%StartShownPreambleCommands

%StopShownPreambleCommands

\begin{document}
\[\begin{array}{ccc}
   S^{\mathcal{W}_\Lambda}\otimes T &
     \stackrel{j}{\longrightarrow}  &      T  \\
   \Big\downarrow                   &   &
   \Big\downarrow\vcenter{%
     \rlap{$\scriptstyle{\mathrm{End}}\,P$}}  \\
   (S\otimes T)/I                   & = & (Z\otimes T)/J
  \end{array}\]
\end{document}
